一种新型多连杆可变压缩比发动机的多体动力学虚拟仿真研究
发布时间：2019-02-21 14:55
【摘要】：近年来,可变压缩比技术和可变配气机构得到了迅猛的发展,其目的都是为了使内燃机具有更好的经济性以及动力性。本文研究了一款多连杆单缸发动机,在原机模型上设计了一套可变压缩比机构,相对原机来说,新机可以实现压缩比的连续可调。并且还考虑到一种可变配气技术,来实现进排气门开启关闭以及升程的变化。在设计的时候充分利用到虚拟样机技术,提供给实体机加工必须得数据参考,节约开发成本和时间。 本文主要包含了以下几个主要研究内容: (1)介绍了一种新型多连杆可变压缩比模型的建立过程,强调了其中几个关键部件结构的设计特点和功能。之后结合虚拟样机技术构建了完善的单缸可变压缩比可变配气机构发动机虚拟样机模型,进行了活塞连杆及配气机构的运动学分析。最后导入BOOST软件模拟的气缸压力曲线,实现新机的多体动力学分析。 (2)模型设计完成之后,考虑到单缸机的振动和噪声,重新设计了新机的平衡系统,由于采用多连杆设计,本文重新分析了惯性力的产生情况,设计了多套平衡装置,并且最后通过最优化方法来找出平衡机构最佳设计和安装的最佳位置。 (3)最后使用到ANSYS WORKBENCH软件来对新机中关键零部件(上连杆,摆杆,下连杆等)实现有限元分析,计算它们的应力应变状况以及强度和疲劳分析。结合ADAMS/auto FLEX模块对连杆、摆杆实现柔性化设计,并分析其和刚性体对比的结果。
[Abstract]:In recent years, the technology of variable compression ratio and variable valve train have been developed rapidly. The purpose of these technologies is to make the internal combustion engine have better economy and power performance. In this paper, a multi-link single-cylinder engine is studied, and a set of variable compression ratio mechanism is designed on the original machine model. Compared with the original engine, the new engine can realize the continuous adjustable compression ratio. A variable valve technology is also considered to realize the opening and closing of inlet and exhaust valve and the change of lift. The virtual prototyping technology is fully utilized in the design, and the data reference must be obtained for the physical machining, which saves the development cost and time. The main contents of this paper are as follows: (1) the establishment of a new multi-link variable compression ratio model is introduced, and the design features and functions of several key components are emphasized. Then a perfect virtual prototype model of a single cylinder variable compression ratio variable valve train engine is constructed with virtual prototyping technology. The kinematics analysis of piston connecting rod and valve train mechanism is carried out. Finally, the cylinder pressure curve simulated by BOOST software is introduced to realize the multi-body dynamics analysis of the new machine. (2) after the model design is completed, considering the vibration and noise of the single cylinder machine, the balancing system of the new machine is redesigned. Finally, the optimal design and installation position of the balancing mechanism is found by the optimization method. (3) at last, the ANSYS WORKBENCH software is used to realize the finite element analysis of the key parts (upper connecting rod, pendulum rod, lower connecting rod, etc.), and to calculate their stress-strain condition, strength and fatigue analysis. The flexible design of connecting rod and pendulum rod is realized with ADAMS/auto FLEX module, and the results of comparison with rigid body are analyzed.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH113;TK401
本文编号：2427600
[Abstract]:In recent years, the technology of variable compression ratio and variable valve train have been developed rapidly. The purpose of these technologies is to make the internal combustion engine have better economy and power performance. In this paper, a multi-link single-cylinder engine is studied, and a set of variable compression ratio mechanism is designed on the original machine model. Compared with the original engine, the new engine can realize the continuous adjustable compression ratio. A variable valve technology is also considered to realize the opening and closing of inlet and exhaust valve and the change of lift. The virtual prototyping technology is fully utilized in the design, and the data reference must be obtained for the physical machining, which saves the development cost and time. The main contents of this paper are as follows: (1) the establishment of a new multi-link variable compression ratio model is introduced, and the design features and functions of several key components are emphasized. Then a perfect virtual prototype model of a single cylinder variable compression ratio variable valve train engine is constructed with virtual prototyping technology. The kinematics analysis of piston connecting rod and valve train mechanism is carried out. Finally, the cylinder pressure curve simulated by BOOST software is introduced to realize the multi-body dynamics analysis of the new machine. (2) after the model design is completed, considering the vibration and noise of the single cylinder machine, the balancing system of the new machine is redesigned. Finally, the optimal design and installation position of the balancing mechanism is found by the optimization method. (3) at last, the ANSYS WORKBENCH software is used to realize the finite element analysis of the key parts (upper connecting rod, pendulum rod, lower connecting rod, etc.), and to calculate their stress-strain condition, strength and fatigue analysis. The flexible design of connecting rod and pendulum rod is realized with ADAMS/auto FLEX module, and the results of comparison with rigid body are analyzed.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH113;TK401
【参考文献】
相关期刊论文 前10条
1 吴文秀;刘威;周丰;何志辉;;基于Workbench的圆锥直齿轮静接触应力分析[J];成组技术与生产现代化;2011年01期
2 刘铸永;洪嘉振;;柔性多体系统动力学研究现状与展望[J];计算力学学报;2008年04期
3 于珊珊,徐尚德,雷君相;多连杆机构分析和虚拟样机技术的发展[J];机械设计与制造;2004年05期
4 黄永安;尹周平;邓子辰;熊有伦;;多体动力学的几何积分方法研究进展[J];力学进展;2009年01期
5 林建生;张宝欢;付伟成;刘元阁;张霖;;一种新型多杆内燃机的机构运动学与动力学的虚拟仿真研究[J];内燃机学报;2006年06期
6 王天友;刘大明;张学恩;张东明;刘书亮;赵华;;可变气门升程下汽油机缸内气体流动特性的研究[J];内燃机学报;2008年05期
7 宋健,张越今,穆希辉;机械系统分析软件ADAMS在汽车列车动力学仿真中的应用[J];汽车工程;1997年05期
8 王丽娟;黄清世;白冰;;基于ANSYS的齿轮模型建立及齿根弯曲应力分析[J];机械工程与自动化;2008年02期
9 熊光楞,范文慧,陈晓波;复杂产品开发的仿真技术[J];系统仿真学报;2004年02期
10 王秋晓;徐宗俊;;单缸发动机平衡测试调整方法与实验的研究[J];中国机械工程;2006年02期
相关硕士学位论文 前1条
1 张霖;多杆内燃机柔性体优化分析[D];天津大学;2006年
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